The Collaborative International Dictionary
Nickelic
Nickelic \Nick*el"ic\, a. (Chem.) Pertaining to, or containing, nickel; specifically, designating compounds in which, as contrasted with the nickelous compounds, the metal has a higher valence; as nickelic oxide.
Wiktionary
nickelic
a. 1 Containing nickel. 2 (context chemistry English) Containing trivalent nickel.